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Fri, 11 Apr 2025 10:50:44 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 53BAohEk025735 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 11 Apr 2025 10:50:43 GMT Received: from [10.218.7.247] (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Fri, 11 Apr 2025 03:50:37 -0700 Message-ID: <317faeaa-3130-4e28-8c5d-441a76aa79b4@quicinc.com> Date: Fri, 11 Apr 2025 16:20:33 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V3 4/9] phy: qcom-qmp-ufs: Refactor UFS PHY reset To: Dmitry Baryshkov CC: , , , , , , , , , , , , , References: <20250410090102.20781-1-quic_nitirawa@quicinc.com> <20250410090102.20781-5-quic_nitirawa@quicinc.com> Content-Language: en-US From: Nitin Rawat In-Reply-To: X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Authority-Analysis: v=2.4 cv=VbH3PEp9 c=1 sm=1 tr=0 ts=67f8f404 cx=c_pps a=ouPCqIW2jiPt+lZRy3xVPw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=GEpy-HfZoHoA:10 a=IkcTkHD0fZMA:10 a=XR8D0OoHHMoA:10 a=COk6AnOGAAAA:8 a=pCJWkS2Mr8WjEUJzeJAA:9 a=QEXdDO2ut3YA:10 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-GUID: BKyyhwUP6BlbJkbaohdTzq9YC28tcw77 X-Proofpoint-ORIG-GUID: BKyyhwUP6BlbJkbaohdTzq9YC28tcw77 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-11_04,2025-04-10_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 phishscore=0 impostorscore=0 suspectscore=0 adultscore=0 spamscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 bulkscore=0 mlxscore=0 mlxlogscore=999 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504110068 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250411_035100_688209_45E40D13 X-CRM114-Status: GOOD ( 18.26 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org On 4/11/2025 1:38 AM, Dmitry Baryshkov wrote: > On Thu, Apr 10, 2025 at 02:30:57PM +0530, Nitin Rawat wrote: >> Refactor the UFS PHY reset handling to parse the reset logic only once >> during probe, instead of every resume. >> >> Move the UFS PHY reset parsing logic from qmp_phy_power_on to >> qmp_ufs_probe to avoid unnecessary parsing during resume. > > How did you solve the circular dependency issue being noted below? Hi Dmitry, As part of my patch, I moved the parsing logic from qmp_phy_power_on to qmp_ufs_probe to avoid unnecessary parsing during resume. I'm uncertain about the circular dependency issue and whether if it still exists. Regards, Nitin > >> >> Co-developed-by: Ram Kumar Dwivedi >> Signed-off-by: Ram Kumar Dwivedi >> Signed-off-by: Nitin Rawat >> --- >> drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 61 +++++++++++++------------ >> 1 file changed, 33 insertions(+), 28 deletions(-) >> >> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c >> index 636dc3dc3ea8..12dad28cc1bd 100644 >> --- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c >> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c >> @@ -1799,38 +1799,11 @@ static int qmp_ufs_com_exit(struct qmp_ufs *qmp) >> static int qmp_ufs_power_on(struct phy *phy) >> { >> struct qmp_ufs *qmp = phy_get_drvdata(phy); >> - const struct qmp_phy_cfg *cfg = qmp->cfg; >> int ret; >> dev_vdbg(qmp->dev, "Initializing QMP phy\n"); >> >> - if (cfg->no_pcs_sw_reset) { >> - /* >> - * Get UFS reset, which is delayed until now to avoid a >> - * circular dependency where UFS needs its PHY, but the PHY >> - * needs this UFS reset. >> - */ >> - if (!qmp->ufs_reset) { >> - qmp->ufs_reset = >> - devm_reset_control_get_exclusive(qmp->dev, >> - "ufsphy"); >> - >> - if (IS_ERR(qmp->ufs_reset)) { >> - ret = PTR_ERR(qmp->ufs_reset); >> - dev_err(qmp->dev, >> - "failed to get UFS reset: %d\n", >> - ret); >> - >> - qmp->ufs_reset = NULL; >> - return ret; >> - } >> - } >> - } >> - >> ret = qmp_ufs_com_init(qmp); >> - if (ret) >> - return ret; >> - >> - return 0; >> + return ret; >> } >> >> static int qmp_ufs_phy_calibrate(struct phy *phy) >> @@ -2088,6 +2061,34 @@ static int qmp_ufs_parse_dt(struct qmp_ufs *qmp) >> return 0; >> } >> >> +static int qmp_ufs_get_phy_reset(struct qmp_ufs *qmp) >> +{ >> + const struct qmp_phy_cfg *cfg = qmp->cfg; >> + int ret; >> + >> + if (!cfg->no_pcs_sw_reset) >> + return 0; >> + >> + /* >> + * Get UFS reset, which is delayed until now to avoid a >> + * circular dependency where UFS needs its PHY, but the PHY >> + * needs this UFS reset. >> + */ >> + if (!qmp->ufs_reset) { >> + qmp->ufs_reset = >> + devm_reset_control_get_exclusive(qmp->dev, "ufsphy"); > > Strange indentation. > >> + >> + if (IS_ERR(qmp->ufs_reset)) { >> + ret = PTR_ERR(qmp->ufs_reset); >> + dev_err(qmp->dev, "failed to get PHY reset: %d\n", ret); >> + qmp->ufs_reset = NULL; >> + return ret; >> + } >> + } >> + >> + return 0; >> +} >> + >> static int qmp_ufs_probe(struct platform_device *pdev) >> { >> struct device *dev = &pdev->dev; >> @@ -2114,6 +2115,10 @@ static int qmp_ufs_probe(struct platform_device *pdev) >> if (ret) >> return ret; >> >> + ret = qmp_ufs_get_phy_reset(qmp); >> + if (ret) >> + return ret; >> + >> /* Check for legacy binding with child node. */ >> np = of_get_next_available_child(dev->of_node, NULL); >> if (np) { >> -- >> 2.48.1 >> > -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy